Hydroxyamine hydrochloride → HCID 54279483, compound

Participants

Reaction Steps

Sodium acetate (0.31 g) was added with stirring to a mixture of 3-cyclopropyl-1-[3,4-difluoro-2-(methylsulphonyl)phenyl]-2-ethoxymethylenepropane-1,3-dione (1.1 g) and hydroxylamine hydrochloride (0.26 g) in ethanol. The mixture was stirred for 2.5 hours. The mixture was evaporated to dryness and the residue was suspended in ethyl acetate, washed with water, dried (anhydrous MgSO4) and filtered. The filtrate was evaporated to dryness. The residue was triturated with n-hexane and filtered to give 5-cyclopropyl-4-(3,4-difluoro-2-methylsulphonylbenzoyl)isoxazole (compound 283, 0.59 g) as an orange solid, m.p.115°-118° C.

Provenance & Evidence